Odpowiedź :
Odpowiedź:
d) 2 • m - 4 = 8
2 • m = 8 - 4
2 • m = 12 /: 2
m = 6
Spr. : L = 2 • m - 4 = 2 • 6 - 4 = 12 - 4 = 8
P = 8
L = P
e) 8 • x + 7 = 15
8 • x = 15 - 7
8 • x = 8 /: 8
x = 1
Spr. : L = 8 • x + 7 = 8 • 1 + 7 = 8 + 7 = 15
P = 15
L = P
f) -4 • h + 5 = 29
-4 • h = 29 - 5
-4 • h = 24 /: (-4)
h= -6
Spr. : L = -4 • h + 5 = -4 • (-6) + 5 = 24 + 5 =
= 29
P = 29
L = P
Pozdrawiam.